On the distribution of the estimated process yield index Spk

James W. Wisnowski, James R. Simpson, Douglas C. Montgomery

Research output: Contribution to journalArticlepeer-review

87 Scopus citations


An asymptotic distribution for an estimate of the process yield index was considered. The asymptotic distribution of estimate was useful in statistical inferences for process yield index. Hypothesis testing and interval estimation on yield index were studied with the help of an example. The process satisfied the capability requirement yield index for its value greater than one. An approximate 95% confidence interval for yield index was found to be consistent with the hypothesis testing results.

Original languageEnglish (US)
Pages (from-to)111-116
Number of pages6
JournalQuality and Reliability Engineering International
Issue number2
StatePublished - Mar 1 2002
Externally publishedYes


  • Central limit theorem
  • Illustrative example
  • Normal distribution

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Management Science and Operations Research


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